We backpacked Rae Lakes Loop in Kings Canyon NP the end of September. It is in our top three places in the Sierra so far! It was absolutely stunning! If you'd like to see the route we took, check out Scott Turner's write up over at Modern Hiker:
We got lucky with perfect weather, but understood taking the trip that late in the season was risky, and were prepared for weather including snow if needed. Luckily the weather was perfect! Enjoy the photos!